Apparatus for disintegrating and drying pulp.



No. 690,238. Patented Dec. 3|, IQI.y F. C. CREAN. APPARATUS FOR DISINTEGHATING AND DRYING PULP. (Application led Aug. 19, 1901.)

(N0 Model.)l

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C vUNITED STATES PATENT OFFICE.

FRANCIS CHARLES CREAN, OF MONTREAL, CAADA.

'APPARATUS FOR DISINTEGRATING AND DRYING PULP.

SPECIFICATION 'forming part of Letters Patent No. 690,238, dated December 3l, 1901. v

Application iiled August 19, 1901. Serial No. 72,587. (No model.)

T0 @ZZ whom it may concern.-

Be it known that I, FRANCIS CHARLES CREAN, mining engineer, of the city of Montreal, in the district of Montreal and Province of Quebec, Canada, have invented certain new and useful Improvements in Apparatus for Disintegrating and Drying Pulp; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates particularly to the preparation of pulp for shipment or storage; and it has for its object to render the pulp fit for shipment or storage without endangering' the loss of any of its properties.

The invention may be said, briefly, to consist in providing an apparatus for dividing the pulp while in sheet form into fragments and then subjecting these fragments to a heated drying atmosphere. To this end I extend the discharge-belt or traveling table of the drying-machine into a drying-chamber, and a pair of disintegrating-rolls of peculiar construction are located adjacent to the end of said belt projecting into the chamber, the action of these disintegrating-rolls being to throw the pulp therefrom in fragments. A serpentine apron extends from these disintegrating-rolls (from which it receives the fragmental pulp) through the chamber fo-areceptacle outside of the chamber, into which the pulp fragments are dropped after having been carried through the, chamber on the serpentine apron, a device being provided for drying the said apron before it returns to the chamber. For full comprehension, however, of my invention reference must be had to the accompanying drawings, forming a part of this specification, in which likel symbols indicate the same parts, and wherein- Figure l is a longitudinal vertical sectional View of my improved apparatus, taken on line A B, Fig. 2. Fig. 2 is a transverse vertical sectional view thereof, taken on line C D, Fig. l; and Fig. 3 is a detail perspective view of my improved disintegrating-rolls, illustrating the manner in which the'sheet of pulp is reduced to fragments and the fragments thrown from said rolls.

The chamber, the walls of which are located at a a b b', has an opening c in one wall for admitting the traveling belt d, upon which the pulp e in sheet form is carried.

This belt is, as usual, in the form of a loop, the end of which Within the chamber takes over a. roll f. The disintegrating-rolls are located adjacent to said'roll f, and one of them receives' the sheet-pulp from the traveling belt and carries it to the other, and vbetween them it is disintegrated into fragmental form and thrown to the serpentine apron, to be presently described. One, g, of these disintegrating-rolls is iiuted, and the liutings h in z the vperimeter thereof are of such a length as to take several to equal the length of the roll and are disposed in staggered relation to one another, while the other roll, lo, is in the form of a rotary brush having exceedingly stiff bristles. The roll `g is driven, preferably, from the rollf by-means ofV gears h and the roll 7c independently at a high speed from an outside source by means of beltj.

A series of rolls m are mounted within the chamber with their ends or trunnions projecting through the side walls thereof, each of these rolls being furnished with a sprocketwheel n, ldriven from any suitable source by a chain u. 'A roll p and a series of hollow rolls r are located outside of but adjacent to the delivery end of the chamber, the roll p near the top of the chamber and the rolls r near the bottom thereof, while an apron s is passed around the rolls m in serpentine form, thence through the wall b', over roll p, down to and around the rolls r, andthrough the lower portion of the wall b to the roll lowermost of the -rolls m.

The chamber is heated by a bank of steamcoils, the horizontal pipes t of which extend between the layers of the serpentine apron and the vertical pipes u on each side thereof, while the steam supplied thereto is fed first to the interior of the cylindrical rolls fr, and is taken from them through pipe oto the bottom of the bank of coils, whence it is exhausted through exhaust-pipe w.

The cylindrical rolls fr are mounted upon hollow trunnions r, which are connected to one another by pipes r2 in such a manner as to cause the steam to pass therethrough consecutively before entering the chamber. Each of the rolls m is of skeleton form to prevent the fragmental pulp adhering thereto during the drying process. The function of the heated rolls ris to dry the serpentine IOO apron after it delivers the pulp fragments to the receptacle and before it renters the chamber. The fragments of pulp are separated from the sheet by the pressure of the rotary brush upon the edges of the liutings of its companion roll, (see Fig. 3,) and the spring of the bristles back to their normal position will throw the detached fragments away from the tinted roll, as shown in Fig. 1.

It is obvious that, if desired, the flutings or depressions h in roll g can be varied considerably in form and other changes made in the specific construction and arrangementof the parts of my apparatus without departing from the spirit of my invention.

WhatI claim is as follows:

l. An apparatus for disintegrating sheetpulp comprising a luted roll the iiutings whereof are in one piece therewith and a roi tary brush'in contact with said roll; means for rotating said roll and brush in opposite directions, for the purpose set forth.

2. An apparatus for disintegrating sheetpulp comprising a tinted roll the flutings of said roll being in one piece therewith and less in length than one-half that of the roll and disposed in staggered relation to one another, a rotary brush in contact with said roll and means for rotating said roll and brush in opposite directions, for the purpose set forth.

3. The combination with a heated chamber, of a pair of disintegrating-rolls located within said chamber, means for feeding pulp in sheet form to said rolls; and a serpentine traveling apron leading from said rolls to the exterior of the chamber, substantially as described and for the purpose set forth.

4. The combination with a heated chamber, of a pair of disintegrating-rolls located within said chamber, means for feeding pulp in sheet form to said rolls; a serpentine traveling apron leading from said rolls to the exterior of the chamber and means for drying said apron while outside of said chamber, substa'n tially as described and for the purpose set forth.

5. The combination with a heated chamber, of a pair of disintegrating-rolls located within said chamber, said rolls consisting of a iiuted roll and a rotary brush in contact with one another;.means for feeding pulp in sheet form to said rolls; and aserpentine traveling apron leading from said rolls to the exterior of the chamber, substantially as described and for the purpose set forth.

6. The combination with aheated chamber, of a pair of disintegrating-rolls located within said chamber, said rolls consisting of a tinted roll and a rotary brush in contact with one another; means for feeding pulp in sheet form to said rolls; a serpentine traveling apron leading from said rolls to the exterior of the chamber and means for drying said apron while'outside of said chamber, substantially as described and for the purpose set forth.

7. The combination with a heated chamber of a pair of disintegrating-rolls within said chamber; means for rotating said rolls, means for feeding pulp insheet form to said rolls, a series of feeding-rolls distributed throughout the interior of said chamber, a series of heated rolls outside of said chamber; and an apron in loop form passed around the feeding-rolls in serpentine form and around said heated rolls, substantially as described and for the purpose set forth.

S. The combination with a heated chamber of a pair of disintegrating-rolls within said chamber; said rolls consisting of a uted roll and a rotary brush in contact with one another; means for rotating said rolls in opposite directions means for feeding pulp in sheet form to said rolls, a series of feeding-'rolls distributed throughout the interior of said chamber; a series of heated rolls outside of said chamber; and an apron in loop form passed around the feeding-rolls in serpentine form and around said heated rolls, substantially as described and for the purpose set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

FRANCIS CHARLES CREAN.

vWitnesses:

WILLIAM P. MCFEAT, FRED. J. SEARS. 

